The Bastion's economy revolves around blacksmithing and selling rare minerals from the Ashen wastes. The city is by a wide margin the largest manufacturer of all metal tools - farming tools, weapons and armors, with the rare minerals from Ashen wastes being a vital ingredient to some of the more exotic armors and weapons.
The Grand Bastion is the only manufacturer of Guns, explosives, gunpowder and napalm. Using them to trade for food with farming villages located in the Grassland Expanse.